The Only Secure Enterprise Calendar Solutionfor Microsoft 365
See all your Microsoft 365, Outlook, SharePoint and internet calendars in one color-coded view. Your calendar data stays in your own Microsoft 365 tenant.
Key features:
All department calendars on one screen
Outlook, SharePoint lists, Planner, room mailboxes and Google or iCloud feeds in one color-coded view, without switching between sites.
The whole year on one page
Year, Year Quarter and Flat Year views show twelve months of deadlines, holidays and releases at a glance.
Time off approved in the calendar
Approve or reject vacation requests from a SharePoint list right in the calendar, color-coded by status.
Trusted by Industry Leaders
and over 8,000 businesses worldwide
What is Virto Calendar App?
Virto Calendar App is an enterprise-grade calendar overlay solution for Microsoft 365 and SharePoint Online. It consolidates multiple calendars—personal, team, departmental, or project-based—into a single unified, color-coded interface for real-time visibility and centralized planning.
Core Use Cases
Overlay multiple SharePoint Online calendars
Combine multiple SharePoint lists or calendar sources from sites and subsites into a unified visual schedule. No need to switch between pages—everything is in one place.
Combine Outlook and Microsoft 365 calendars
Integrate Exchange Online and Microsoft 365 group events with your SharePoint calendars. Keep personal, team, and corporate events together for complete transparency.
Visualize shared calendars across teams and departments
Create department-level views that display events from Marketing, HR, IT, and Project teams simultaneously. Simplify resource coordination and avoid scheduling conflicts.
Comparison: Native M365 Calendar vs Virto Calendar App
Microsoft 365 / SharePoint Calendar
Virto Calendar AppUpgrade your scheduling from visibility gaps to total calendar harmony.
Choose the perfect plan to match your business needs.
Get the App for M365Technical & Enterprise Readiness
Full compatibility with Microsoft 365, SharePoint Online, and Exchange Online environments.
Flexible deployment — standard SaaS on Microsoft Azure (US) that processes your data without storing it, or Enterprise-tier custom deployment into your own infrastructure or Microsoft 365 tenant.
Secure architecture aligned with Microsoft 365 governance, identity management, and permission frameworks.
Enterprise scalability supporting large organizations, multi-departmental rollouts, and hybrid workforce scenarios.
Performance-optimized for real-time synchronization without exceeding Microsoft Graph or API rate limits.
Integrations
Connect to the tools your teams use the most so everyone works seamlessly in one place.
Sized to fit your business
Choose the perfect plan to match your business needs.
Virto Shared Calendar
Simple to Use. Smart to Share. Affordable for Everyone
Discover more about Virto Shared Calendar ›Good to know
Install from Microsoft Marketplace
A SharePoint or Global Administrator adds the app and approves its permissions once.
Documentation →One license for all platforms
Get SharePoint, Microsoft Teams and Azure license at once without any additional purchase.
Deploy in your own Azure
Run the app in the Azure subscription linked to your Microsoft 365, under your control.
How it works →Your data
Your content stays in your Microsoft 365 tenant: the app processes it without storing it.
Trust & Security Center →Discounts and quotes
15% off for education, healthcare and charities; custom quotes for larger organisations.
Talk to sales →
The pricing outlined herein is valid only as to new purchases occurring on or after June 1, 2024. VirtoSoftware reserves the right to adjust its packaging and pricing at any time.
Mastering Microsoft 365 Calendars
Improve your Microsoft 365 calendar skills with tutorials and guides from VirtoSoftware's knowledge hub.
- Mastering Shared Calendars in Microsoft 365 and SharePoint Learn how to synchronize and share calendars effectively across teams, and see how Virto overlays simplify complex scheduling.
- How to Create an Office 365 Shared Calendar Build shared group calendars and learn when to switch from native views to an overlay-powered interface like Virto Calendar App.
- Top Shared Calendars for SharePoint Online Evaluate built-in tools vs third-party calendars to identify when your organization needs an enterprise-grade planning solution.
FAQ
Microsoft 365 & SharePoint Online Calendar Management
Native Microsoft 365 tools allow individual calendar sharing, but they lack a unified overlay. Virto Calendar App brings all calendars into one centralized view for streamlined coordination.
Yes. Native SharePoint calendars are site-specific and limited in visualization. Virto Calendar App overlays multiple SharePoint calendars, providing enhanced usability and visibility for enterprise teams.
Absolutely. Virto Calendar App integrates Outlook, Exchange, and SharePoint Online calendars into a single synchronized view—ideal for cross-departmental scheduling.
Your calendar data stays where it already lives, in your own Microsoft 365 tenant (SharePoint lists, Exchange calendars, Planner) or in the internet calendars you connect. The app's backend runs on Microsoft Azure in the US and processes events in memory only; VirtoSoftware never stores your content. For Enterprise-tier customers, custom deployment into your own infrastructure or Microsoft 365 tenant is available.
Virto Calendar App is published in the Microsoft commercial marketplace and has completed Microsoft Publisher Attestation — a detailed security, compliance, and data-handling report submitted to Microsoft.
Ready to unify your enterprise calendars?
Need clarity on whether our app is suitable for you? Set up a quick call with us or chat via Microsoft Teams to explore its potential for your needs.
